hey,did you try a search?
also check out Harmony Central reviews;they'd be found under guitar amps,as the site has no specific bass amp category.
some have been accused of being snobs around here,but it's just that these questions pop up alot.tons of good information,and very knowledgable forumites.
good luck.-

I currently own a 2001RB and previously owned a 1001RB.They are both great amps.They are both very punchy,articulate/fast and loud.They never get mushy and cut through at high volumes very well.It depends on what features and how much power you need.The new 1001RB puts out 700 watts @4 ohms and is a very straight forward and loud amp with a great tone.If you want 1080 watts,the ability to drive more cabs,a good distortion/OD channel,ability to mute the tweets at will,a tuning mute,great tone and you don't mind carrying a 40 lb. amp,get the 2001RB like I did.Either way you'll be happy.I am.

I have the 1001rb and I've been running it for over two years. It is a great head. The GK specs state that it's 18 lbs and puts out 540 watts at 4 ohms and 340 watts at 8 ohms. It's small, light weight, and does a great job with my two Eden 2-10XLT cabs.

The 2001rb will give you significantly more head room with more than double the weight.

While these heads won't rival a high-end preamp coupled with a class A power amp, both GK heads do a great job depending on your personal needs as far as head room and additional features.

A search of this forum for for "GK" or "gallien krueger" will yield more info for you to consider.

I let a friend play through my 1001rb recently, and I cracked up when he asked "this sounds good, nice tone, does it have tubes?"

I've played through heads by SWR, Eden, and even high-end tube preamps coupled with great power amps. My buddy's comment says it all. GKs sound good, maybe not the bonafide "high-end preamp and class A power amp", but they do sound pretty good!

Originally posted by basss
Cantstandsya
Did GK put out a new 1001RB? Any other info on it? Where/When are they available?

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Yes, the RB line has been reworked a bit. More power, more sound, same $$$. I've known for a while now but was sworn to secrecy until NAMM, so I'm assuming it's alright to talk about them now. The RBH cabs have also been reworked. They'll have a conventional box shape and more low end response. That's the changes in a nutshell. Wait until Trip is back and then ask him. He should be able to give you the skinny... later---

Yes, the RB line has been reworked a bit. More power, more sound, same $$$. I've known for a while now but was sworn to secrecy until NAMM, so I'm assuming it's alright to talk about them now. The RBH cabs have also been reworked. They'll have a conventional box shape and more low end response. That's the changes in a nutshell. Wait until Trip is back and then ask him. He should be able to give you the skinny... later---

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I'm about to buy a 400rb combo. Should I wait till march for the new cabs to come out?

Across the board everything is 10db quieter. Hiss is almost non-existent. Tone is a bit deeper too. New look too. The SBX cabs blew my mind. I used those for my Bass Bash show. New Combos have more space in the cabs so the tone is deeper as well. I sold one at the show to a stick player who tried everything at the show and came back to the GK unit. I even told him to try EVERYTHING before he did the GK thing. Pretty cool...nice day for me.